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Finding the Fourth Proportional to 139,911.60, 193,072.38 and 76,248.02

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Solution

The fourth proportional to 139,911.60, 193,072.38 and 76,248.02 is: 105,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,911.60 : 193,072.38 = 76,248.02 : x
  2. Step 2: Convert to fraction form
    139,911.60/193,072.38 = 76,248.02/x
  3. Step 3: Cross multiply
    139,911.60x = 193,072.38 × 76,248.02
  4. Step 4: Simplify right side
    139,911.60x = 14,721,386,691.69
  5. Step 5: Solve for x
    x = 14,721,386,691.69/139,911.60
  6. Step 6: Final answer
    x = 105,219.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.